As far as I know it's a mandatory cert item that these items are triggered from the * button
Also I believe the event is handled by the firmware and not passed to the app
So I would suggest a hybrid approach that you
a) permit the natural firmware to do its work as Roku intend
b) if you have enhancements via the mobile app, then run them too from the mobile app
Feel free to join the roku developers slack workspace and post in the #general channel to discuss for more ideas
https://join.slack.com/t/rokudevelopers/shared_invite/zt-1zkm3krph-DBHjkyrZ3K_g6Mo8s3x~Sg